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Potosi Lake, MO Weather Forecast
Potosi Lake, MO Weather Forecast Date: 523 AM CDT Tue Aug 04 2026
The area/counties/county of: Gasconade County Mo, including the cities of: Washington, Union, and Sullivan.or toggle through each period.
Today... Patchy fog this morning. Sunny. Highs in the upper 80s. South winds around 5 mph.
Tonight... Mostly clear. Lows in the upper 60s. Southeast winds around 5 mph.
Wednesday... Sunny. Highs in the lower 90s. South winds around 5 mph.
Wednesday Night... Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. Lows around 70. South winds around 5 mph. Chance of rain 70%.
Thursday... Showers likely with a chance of thunderstorms in the morning, then partly sunny in the afternoon. Highs in the upper 80s. South winds around 5 mph. Chance of rain 70%.
Thursday Night... Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 50%.
Friday... Partly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 50%.
Friday Night... Mostly cloudy with a slight chance of showers and thunderstorms in the evening, then partly cloudy with a chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 50%.
Saturday... Mostly sunny with a slight chance of showers and thunderstorms. Highs around 90. Chance of rain 20%.
Saturday Night... Mostly clear. Lows in the lower 70s. Highs in the lower 90s. Heat index values up to 105.
Sunday... Mostly clear. Lows in the lower 70s. Highs in the lower 90s. Heat index values up to 105.
POP = Probability of Precipitation
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